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/* Copyright (C) 2025 awy <awy@awy.one>
stweath is free software: you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation,
either version 3 of the License, or (at your option) any later version.
stweath is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public
License along with stweath. If not, see
<https://www.gnu.org/licenses/>. */
#include <curl/curl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <time.h>
#include <unistd.h>
#include "cjson/cJSON.h"
int
getforecast(char *path)
{
FILE *report;
CURL* handle;
CURLcode res;
report = fopen(path, "w");
if (!report) { return 1; }
handle = curl_easy_init();
if (!handle) {
fclose(report);
return 1;
}
curl_easy_setopt(handle, CURLOPT_URL, "https://wttr.in/?format=j1");
curl_easy_setopt(handle, CURLOPT_WRITEFUNCTION, NULL);
curl_easy_setopt(handle, CURLOPT_WRITEDATA, report);
res = curl_easy_perform(handle);
if (res != CURLE_OK) {
fclose(report);
return 1;
}
curl_easy_cleanup(handle);
fclose(report);
return 0;
}
int
showforecast(char *path)
{
long size;
char *data;
char *icon;
cJSON *root, *temp, *wcode, *rain;
FILE *report;
report = fopen(path, "rb");
if (!report) { return 1; }
fseek(report, 0, SEEK_END);
size = ftell(report);
fseek(report, 0, SEEK_SET);
data = malloc(size + 1);
if (!data) {
perror("malloc");
fclose(report);
return 1;
}
fread(data, 1, size, report);
data[size] = '\0';
fclose(report);
root = cJSON_Parse(data);
free(data);
if (!root) { return 1; }
rain = cJSON_GetArrayItem(cJSON_GetObjectItem(root, "weather"), 0);
rain = cJSON_GetArrayItem(cJSON_GetObjectItem(rain, "hourly"), 0);
rain = cJSON_GetObjectItem(rain, "chanceofrain");
temp = cJSON_GetObjectItem(root, "current_condition");
temp = cJSON_GetArrayItem(temp, 0);
wcode = cJSON_GetObjectItem(temp, "weatherCode");
temp = cJSON_GetObjectItem(temp, "temp_C");
switch (atoi(wcode->valuestring)) {
case 113: icon = ""; break;
case 116: icon = ""; break;
case 119:
case 122:
case 143:
case 248:
case 260:
icon = ""; break;
case 176:
case 179:
case 182:
case 185:
case 263:
case 266:
case 281:
case 284:
case 293:
case 296:
case 299:
case 302:
case 305:
case 308:
case 311:
case 314:
case 317:
case 350:
case 353:
case 356:
case 359:
case 362:
case 365:
case 368:
case 392:
icon = ""; break;
case 200: icon = ""; break;
case 227:
case 230:
case 320:
case 323:
case 326:
case 374:
case 377:
case 386:
case 389:
icon = ""; break;
case 329:
case 332:
case 335:
case 338:
case 371:
case 395:
icon = ""; break;
default: icon = "❓"; break;
}
if (atoi(rain->valuestring) != 0) {
printf(" %s%% ", rain->valuestring);
}
printf("%s %s°C", icon, temp->valuestring);
cJSON_Delete(root);
return 0;
}
int
checkforecast(char *path)
{
time_t now;
char *buff;
struct stat st;
int tries, force;
/* Check if there is WEATHERFORCEUPDATE
environment variable */
force = 0;
buff = getenv("WEATHERFORCEUPDATE");
if (buff && buff[0] == '1') { force = 1; }
if (stat(path, &st) != 0) { return 1; }
now = time(NULL);
if (now == ((time_t)-1)) { return 1; }
/* Check if 30 mins passed
then get new forecast */
if (((now - st.st_mtime) >= 1800) || force) {
tries = 0;
/* Try 100 fast retries */
while (tries < 100) {
if(getforecast(path) == 0) {
break;
}
tries++;
sleep(1);
}
}
showforecast(path);
return 0;
}
int
main(void)
{
char *path;
path = getenv("XDG_CACHE_HOME");
if (!path) { puts("XDG_CACHE_HOME is not set"); return 1; }
strcat(path, "/weatherreport.json");
curl_global_init(CURL_GLOBAL_ALL);
checkforecast(path);
curl_global_cleanup();
return 0;
}
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